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Excerpt: Claudio Martella introduces Apache Giraph which according to him is a loose implementation of Google Pregel which was introduced  on SIGMOD in 2010. He points out that Map Reduce cannot be used to do graph processing. He then gave an example on how MapReduce can be used to to do page rank calculation. He points out that Pagerank can be calculated as a local property of a graph in a distributed way by calculating local pagerank from the knowledge of the neighbours. He did this to show what the Drawbacks of this method are in his oppinion: job boostrap take some time disk is hit about 6  times Data is…

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René Pickhardt on February 4th, 2012

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Excerpt: Since I went to Brussesl to attend the Free Open Source Developer European Meeting and give a talk about graphity I had also some time to attend some interesting talks. Since I will teach a class in summer for students about creating a basic webserver and webbrowser I decided to listen to some talks of the mozilla devrooom. I first attended a very refreshing and fun talk given by Bobby Holley a platform engineer at mozilla about hacking the Rendering Engine Gecko. I think I realized some things that are not only of interest for hacking gecko but also for hacking metalcon…

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Excerpt: Believing in open models and supporting ideas of copy left I am more than happy to see the current developement of scientists worldwide publicly making statements of not supporting Elsevier in the future which I will obviously join! You can find the page where scientists make thos statements under: http://thecostofknowledge.com/ And you find much more resources on the whole discussion under http://michaelnielsen.org/polymath1/index.php?title=Journal_publishing_reform Is this enough or do we need to go even further? in my oppinion we need to take much more steps. Journals and publications where good institutions in times 50 years ago. Where it took mankind much efford to spread valuable information. But heaving…

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René Pickhardt on January 25th, 2012

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Excerpt: Ok no secret here that I am a Google Fan. But listening to the Google Report of 2011 I am just amazed and speechless. Everything is growing: $10 bn revenue / quartal ==> more than $100 mio. / day!!! 90 Mio Google+ users over 60% of plus users engage daily with it and over 80% weekly! 350 Mio active Gmail users Youtube makes $5 bn revenue 700’000 android devices installed daily 250 Mio. Android devices in total! 11 bn downloads from the android market chrome is growing (sadly no numbers) But in an interesting (on its own) blog post of reddit you can see 42% of reddit users use chrome (which…

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Excerpt: Filip Stilin is the frontman of House on Mars a promesing young croation band (check out their music on bandcamp). He loves music and online marketing so he read my blog and sent me and email with a couple of interesting observations and questions. I got his permission to publish parts of his mail and answer the questions to a wider audiance in my blog. Filip: Even though I wasn’t agreeing with your Facebook skepticism in the beginning, I realized that I was overestimating Facebook in its promotion role. I’ve been creating extremely successful, targeted (extremely low budget though – just…

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Excerpt: I am one of the web pioneers but this is about the most amazing thing that I will be witnessing on the web as long as I can remember. Tomorrow on January 18th the english version of Wikipedia will shut down for 24 hours to protest two upcoming (?) american laws (SOPA and PIPA) that set the legal foundations to censor the web. This is happening in the country that is so proud of it’s freedom of speech. Press release: http://wikimediafoundation.org/wiki/Press_releases/English_Wikipedia_to_go_dark Letter to Users: http://wikimediafoundation.org/wiki/English_Wikipedia_anti-SOPA_blackout  User discussion: http://en.wikipedia.org/wiki/Wikipedia:SOPA_initiative/Action see below for a saved copy! This is such an important move of democracy that I was standing still for…

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René Pickhardt on January 13th, 2012

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Excerpt: Doing charity is of course always a good way of doing marketing. But I think the important rule here is that it really has to be honest and come from the hart and not just be ment to be a marketing campaign. I just realized this after three bands I am friend with did something great. I put this under online music marketing, but again the marketing of something like this should just be the side effect (at most): After their third tour together Van Canto, Ordan Ogan and In Legend announced that they will post a piece of Bastian…

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René Pickhardt on January 11th, 2012

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Excerpt: Today I started an experiment I created an excercise for coursework in algorithms and data structures that is very unusuale and many people have been criticle if this was a good idea. The idea behind the exercise is that studens should read wikipedia articles to topics related to lectures and find mistakes or suggest things that could be improoved. Thereby I hope that people will do something that many people in science don’t do often enough: Read something critically and carefully and question the things that you have learnt. (more discussions after the exercise) Read the following wikipedia articles: AVL Trees Red Black…

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Excerpt: UPDATE: (Feb. 8th. 2012) the originial love language video is now linked under the official look for love Video from DJ Sammy! Glad to see that and glad to see that protest on the web seems to be heared. Now I can finally completely enjoy DJ sammy’s work without worries! Record industry as well as many companies that are in the business of publishing are complaining for years that illegal file sharing is killing their market and destroying culture and art. I don’t want to fall into the discussion about how copyleft is superior to copyright. Also not about how wrong…

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René Pickhardt on January 3rd, 2012

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Excerpt: In an earlier post I have explained the need for a Facebook streaming app that has to be enhanced with some features in order to create viral word of mouth effects. Together with Yann Leretaille and Robert Naumann we programmed the facebook API and developed such an app for my band In legend. Today ( even though xmas is gone and 2012 has already started ) it is the time for me to share the source code of this app. have a look at the app here: Your Browser can’t display iframes. go to: this page in order to…

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